Health and safety information23Other medical devicesIf you use any other personal medical devices, consultthe manufacturer of your device to determine if it isadequately shielded from external RF energy. Yourphysician may be able to assist you in obtaining thisinformation. Switch off your phone in health carefacilities when any regulations posted in these areasinstruct you to do so. Hospitals or health care facilitiesmay be using equipment that could be sensitive toexternal RF energy.VehiclesRF signals may affect improperly installed orinadequately shielded electronic systems in motorvehicles. Check with the manufacturer or itsrepresentative regarding your vehicle. You should alsoconsult the manufacturer of any equipment that hasbeen added to your vehicle. You should also consultthe manufacturer of any equipment that has beenadded to your vehicle.Posted facilitiesSwitch off your phone in any facility where postednotices require you to do so.Potentially explosive environmentsSwitch off your phone when in any area with apotentially explosive atmosphere and obey all signsand instructions. Sparks in such areas could cause anexplosion or fire resulting in bodily injury or evendeath.Users are advised to switch off the phone while at arefueling point (service station). Users are reminded ofthe need to observe restrictions on the use of radioequipment in fuel depots (fuel storage and distributionareas), chemical plants or where blasting operationsare in progress.Areas with a potentially explosive atmosphere areoften but not always clearly marked. They include theareas below deck on boats, chemical transfer orstorage facilities, vehicles using liquefied petroleumgas (such as propane or butane), areas where the aircontains chemicals or particles, such as grain, dust ormetal powders, and any other area where you wouldnormally be advised to turn off your vehicle engine.